After a long time without finding, Finally a new method to root the Galaxy Ace 2 with Jelly Bean 4.1.2. If you done the previous manual to upgrade to Jelly Bean, this is to serve rootearlo.
Will serve for all three models Samsung Galaxy, the I8160, I8160P and I8160L
MANDATORY COMMON OPTIONS
2 – connect the phone to the PC via USB and copy this zip arhivo as it is in your SD or sdcard
1 – Walk into maintaining recovery mode keys Vol Up + Power + Home button until it enters into that mode and release the keys.
2 – Select 3ª option. Apply update from external storage, select the root.zip to volume +- and execute it with the button encendido..ahora root files will be installed.
3 – Come up and return to the main menu where it says Reboot system now
4 – And this!!